[pmarreck]

Huge fan of pattern matching and destructuring with rebinding in Elixir (where it actually goes far deeper), it makes code way more succinct. It seems like you haven't grokked it yet (or played with it by trying to write code with it and feeling out what it's actually doing for you vs. the alternatives)... read https://elixir-lang.org/getting-started/pattern-matching.htm... as well as https://elixir-lang.org/getting-started/case-cond-and-if.htm... where you will see that this proposed construct is almost the same syntactically as `case` in Elixir.

Changing `case` in JS to these entirely different semantics would break pretty much everything, which is likely why a new keyword was needed.